mean_power_spectrum_grey

[f-amerehi]

I would like to ask you how can I modify mean_power_spectrum_grey.npy file.It seems it only works for 224x224 images. For the default "test_image.JPEG" image as it is 256x256 I got error the following error

Traceback (most recent call last):
  File "code/image_manipulation.py", line 635, in <module>
    img_power_equalisation = power_equalisation(img, avg_power_spectrum)
                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "code/image_manipulation.py", line 203, in power_equalisation
    return equalise_power_spectrum(image, avg_power_spectrum)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "code/image_manipulation.py", line 478, in equalise_power_spectrum
    assert image.shape[:2] == avg_power_spectrum.shape, 'Image shape={} unequal \
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError: Image shape=(256, 256) unequal             avg_spectrum shape=(224, 224)

I read calculate_mean_power_spectrum.py file and tried to use get_mean_amplitude_spectrum function but is seems the file is buggy and calculate_amplitude_spectrum is not defined or imported

[f-amerehi]

Hi @rgeirhos hope that all is well. Could you please let me know how could I change mean_power_spectrum_grey.npy file to be able to run that code?

Thanks!

[rgeirhos]

Hi @f-amerehi I messaged my co-author @carmete regarding this and am currently waiting for their reply.

[carmete]

Hi @f-amerehi! Thank you for trying out our code. Unfortunately, I cannot re-run the code right now, but here is my quick assessment.

• The error you are seen is expected, as the original mean power spectrum was calculated over a set of 224x224 images. As you correctly identified, you would need to run get_mean_amplitude_spectrum to produce a new power spectrum over your own dataset or any similar dataset of 256x256 images and obtain a new get_mean_amplitude_spectrum.npy

With regards to code bugs in calculate_mean_power_spectrum.py:

• calculate_amplitude_spectrum should be get_amplitude_spectrum

• mean_power_spectrum = np.zeros(image1[:,:,0].shape, image1.dtype) should instead be mean_amplitude_spectrum = np.zeros(image1[:,:,0].shape, image1.dtype)

Let me know, if this works and sorry for the inconvenience!

[f-amerehi]

Hi @carmete. Many thanks for the help!

[f-amerehi]

Thank you very much @rgeirhos also. I'll close off the issue.